![]() Sumon Chakrabarti, an infectious disease specialist at Trillium Health Partners in Mississauga, Ont. "People are thinking about vaccination right now that you have a cup that you're filling half full with the first dose, and you're getting it full with the second - but that's not how immunity works," said Dr. That study also analyzed the AstraZeneca-Oxford vaccine in the same population and found it was 88 per cent effective at curbing hospital admissions from COVID-19. People living in neighbourhoods deemed to be at a higher risk of COVID-19 transmission line up in the rain outside Downsview Arena in Toronto on Wednesday. Have a coronavirus question or news tip for CBC News? Email: or join us live in the comments now.How protected am I until my second shot?Ī recent study in The Lancet looked at more than 23,000 vaccinated healthcare workers in the United Kingdom from December to February and found the Pfizer-BioNTech vaccine was at least 70 per cent effective at preventing COVID-19 three weeks after the first dose.Īnother Lancet study looked at more than 1.3 million people in Scotland during the same time period and found the Pfizer shot was more than 90 per cent effective at preventing hospitalization due to COVID-19 four to five weeks after the initial dose. While we still don't have all the answers, there are some promising early signs that may help put your mind at ease until you get your second shot. ![]() Joseph's Healthcare Hamilton and an associate professor at McMaster University. Zain Chagla, an infectious diseases physician at St. "It's the elephant in the room," said Dr. ![]() If you haven't subscribed yet, you can do that by clicking here.Īfter months of anxiously waiting, many newly vaccinated Canadians are left with more questions than answers - how protected am I after one dose of COVID-19 vaccine, when will I get my second shot and what can I do safely until then? This is an excerpt from Second Opinion, a weekly roundup of health and medical science news emailed to subscribers every Saturday morning.
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